Two sounding bodies are producing progressive waves given by \( y_{1}=2 \sin (400 \pi t) \) and ...
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0Two sounding bodies are producing progressive waves given by \( y_{1}=2 \sin (400 \pi t) \) and \( y_{2}=\sin (404 \pi t) \) where \( t \) is in second, which superpose near the ears of a person. The person will hear
(a) 2 beats/s with intensity ratio \( 9 / 4 \) between maxima and minima
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(b) 2 beats/s with intensity ratio 9 between maxima and minima
(c) 4 beats/s with intensity ratio 16 between maxima and minima
(d) 4 beats/s with intensity ratio \( 16 / 9 \) between maxima and minima
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